This chapter discusses personality, values, perception, and decision making in organizations. It defines personality as unique patterns of thoughts, feelings, and behaviors. Personality traits include openness, conscientiousness, extraversion, agreeableness, and neuroticism. Values are principles that guide behavior and allow organizations to interact pleasantly. Perception involves recognizing and interpreting sensory information, which can vary between individuals. Decision making involves diagnosing problems, gathering information, evaluating alternatives, choosing the best decision, communicating it, and implementing it.